| FISSIONLICENSE | Permit from the Nuclear Regulatory Commission? |
| CLEAROFF | Get lost! Go away from the nuclear officials (5,3) |
| LICENCE | Permit from the Government (7) |
| TICKETMACHINE | Issues permits from the Parks Department presumably for those who don't want their jaguars to be impounded (6,7) |
| OUTLETS | First three characters in 2 down get permits from the branches (7) |
| AECL | Cdn. nuclear regulatory org. |
| AEC | Old nuclear regulatory org. |
| NUCLEUS | Separated from the rest of the cell by the nuclear membrane, this structure controls and regulates the activities of the cell. |
| OBAMA | 71 years after the nuclear bombing of Hiroshima, who was the first sitting US president to visit the city? (6,5) |
| BARACK | 71 years after the nuclear bombing of Hiroshima, who was the first sitting US president to visit the city? (6,5) |
| FALLOUT | Disagree as to the consequence of the nuclear explosion |
| ROCKETLAUNCHER | Toss the nuclear bombs from this (6,8) |
| FUSION | The nuclear reaction which powers the sun (6) |
| HYMAN | Rickover known as the Father of the Nuclear Navy |
| ATOMIC | Weapon which began the nuclear scare, the - bomb (6) |
| ENRICOFERMI | Italian physicist (1901-54) who was one of the chief architects of the nuclear age: 2 wds. |
| HBOMB | The even more powerful second step in the nuclear arms race (1-4) |
| NEUMANN | Von -; Inventor of game theory and the MANIAC computer who was involved in the nuclear weapon doctrine MAD (7) |
| CHERNOBYL | 2019 miniseries on HBO based on the nuclear disaster that happened in the Soviet Union in 1986 |
| STRIDENT | A small weapon, in the past, is now part of the nuclear deterrent (8) |
